WELDING PIPE INNER FACE WELDED BEAD SMOOTHENING TOOL

摘要

PROBLEM TO BE SOLVED: To prevent frictions and bakings between a mandrel and a crashing roll and, smoothen an inner face welded bead at a good working accuracy. SOLUTION: This inner face welded bead smoothening tool forms roll accommodation parts at side faces being mutually opposing each other relating to a center axis of a mandrel 12. A crashing roll 11 and a pressurizing roll 14 accommodated in a roll accommodation part are rotatably supported by a shaft penetrated into an axial hole bored in a mandrel 12. When the crashing roll 11 is pressed to an inner face welded bead W of a welded pipe P, the pressurizing roll 14 is pressed to the opposite side inner face of the welded pipe P.